package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.dto.SetmealDto;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.entity.SetmealDish;
import com.itheima.reggie.mapper.SetmealMapper;
import com.itheima.reggie.service.SetmealDishService;
import com.itheima.reggie.service.SetmealService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
@Slf4j
public class SetmealServiceImpl extends ServiceImpl<SetmealMapper,Setmeal> implements SetmealService {

    @Autowired
    private SetmealDishService setmealDishService;



    /**
     * 新增套餐,同时需要保存套餐和菜品的关联关系
     * @param setmealDto
     */
    @Override
    @Transactional
    public void saveWithDish(SetmealDto setmealDto) {
        this.save(setmealDto);//保存套餐的基本信息，操作setmeal，执行insert操作
        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        setmealDishes.stream().map((item)->{
            item.setSetmealId(setmealDto.getId());
            return item;
        }).collect(Collectors.toList());

        //保存套餐和菜品的关联信息，操作setmeal_dish,执行insert操作
        setmealDishService.saveBatch(setmealDishes);


    }

    /**
     * 删除套餐，同时需要删除套餐和菜品的关联数据
     * @param ids
     */
    @Override
    @Transactional
    public void removeWithDish(List<Long> ids) {
        LambdaQueryWrapper<Setmeal> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(Setmeal::getId,ids);
        queryWrapper.eq(Setmeal::getStatus,1);//查询套餐状态，确定是否可用删除

        int count =this.count(queryWrapper);
        if (count>0){
            throw new CustomException("套餐正在售卖中,不能删除");
        }
        this.removeByIds(ids);

        //删除套餐关联菜品Setmeal_Dish表数据

        LambdaQueryWrapper<SetmealDish> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.in(SetmealDish::getSetmealId,ids);
        setmealDishService.remove(lambdaQueryWrapper);

    }

    /**
     * 根据id查询套餐及其对应菜品信息
     * @param id
     * @return
     */
    @Override
    public SetmealDto getByIdWithDish(Long id) {
        Setmeal setmeal = this.getById(id);
        SetmealDto setmealDto=new SetmealDto();
        BeanUtils.copyProperties(setmeal,setmealDto);

        LambdaQueryWrapper<SetmealDish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(SetmealDish::getSetmealId,id);
        List<SetmealDish> list = setmealDishService.list(queryWrapper);

        setmealDto.setSetmealDishes(list);
        return setmealDto;


    }

    /**
     * 修改套餐及其关联菜品的对应信息
     * @param setmealDto
     */
    @Override
    @Transactional
    public void updateWithDish(SetmealDto setmealDto) {
        //先更新Setmeal表基本信息
        this.updateById(setmealDto);

        //清理套餐对应菜品Setmeal_Dish表信息,delete操作
        LambdaQueryWrapper<SetmealDish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(SetmealDish::getSetmealId,setmealDto.getId());
        setmealDishService.remove(queryWrapper);

        //添加页面提交的套餐对应菜品的信息,insert操作

        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        setmealDishes=setmealDishes.stream().map((item)->{
            item.setSetmealId(setmealDto.getId());
            return item;
        }).collect(Collectors.toList());

        setmealDishService.saveBatch(setmealDishes);
    }


    /**
     * 手写sql，分页查询
     *
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
//    @Override
//    public Page<SetmealDto> pageBySQL(Integer page, Integer pageSize, String name) {
//
//        Page<SetmealDto> dtoPage=new Page<>(page,pageSize);
//        this.getBaseMapper().pageBySQL(dtoPage,name);
//        return dtoPage;
//    }
}